Player Movement and Kept Inbounds

using System.Collections;
using System.Collections.Generic;
using UnityEngine;

public class playerController : MonoBehaviour
{
    public float horizontalInput;
    public float verticalInput;

    public float speed = 10.0f;
    //range for which player can move left and right
    public float xRange = 10;
    //range for which player can move froward and back
    public float zRange = 10;
    //slot for food
    public GameObject projectilePrefab;

    public Transform projectileSpawnPoint;
    void Start()
    {

    }

    void Update()
    {
        //keep player inbounds on the left side
        if (transform.position.x < -xRange)
        {
        transform.position = new Vector3(-xRange, transform.position.y, transform.position.z);
        }
        //keep player inbounds on the right side
        if (transform.position.x > xRange)
        {
            transform.position = new Vector3(xRange, transform.position.y, transform.position.z);
        }


        //move the player left and right
        horizontalInput = Input.GetAxis("Horizontal");
        transform.Translate(Vector3.right * horizontalInput * Time.deltaTime * speed);

        //move the player forward and back
        verticalInput = Input.GetAxis("Vertical");
        transform.Translate(Vector3.forward * verticalInput * Time.deltaTime * speed);


        //keep player inbounds on the lower side
        if (transform.position.z < -zRange)
        {
            transform.position = new Vector3(transform.position.x, transform.position.y, -zRange);
        }
        //keep player inbounds on the upper side
        if (transform.position.z > zRange)
        {
            transform.position = new Vector3(transform.position.x, transform.position.y, zRange);
        }


        //launch projectile using spacebar
        if (Input.GetKeyDown(KeyCode.Space))
        {
            Instantiate(projectilePrefab, projectileSpawnPoint.position, projectilePrefab.transform.rotation); ;
        }
    }
}